PSYCH 101 Exam 2 Latest Version Already Passed

PSYCH 101 Exam 2 Latest Version Already Passed sensation the way that our bodies sense stimuli perception how our brains process the stimuli sensed by our body top-down processing information processing guided by a higher-level mental processes bottom-up processing analysis that begins with the sensory receptors absolute threshold the minimum stimulation necessary for detection 50% of the time difference threshold the minimum difference a person can detect between any two stimuli 50% of the time Weber's Law for their difference to be perceptible, two stimuli must differ by a constant proportion- not a constant amount. Sensory Adaptation our diminishing sensitivity to an unchanging stimulus wavelength the distance from one wave peak to the next; determines hue intensity amount of energy in light waves; determined by a waves amplitude (height); influences brightness accommodation focuses by changing its curvature blind spot where the optic nerve lease the eye there are no receptor cells Cones cluster around the fovea (retina's area of central focus); each has its own bipolar cell; preserves precise information; can see color; can't function in dim light Rods black and white vision; capable in dim light Young-Helmholtz trichromatic theory retina has three types of color receptors, each especially sensitive to red, green, and blue Opponent-process theory as visual information leaves the receptor cells, we analyze it in terms of the opponent colors What are the opponent colors? red and green, blue and yellow, black and white Gate-Control Theory spinal cord; small nerve fibers conduct most pain signals, larger fibers conduct most other sensory signals; spinal cord contains a neurological "gate" when tissue is injured, the small fibers activate